1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7105cf42af9a16284cd160539bd0463aa424181f6a424c61777a8a71bd8a8e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe3def86-ba05-4e83-8280-02d45876b25a.json and https://artists.proofprofile.net/proofs/artist/fe3def86-ba05-4e83-8280-02d45876b25a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b2f65b0deb84bf06f63dd8e65de2099d9e33b96eb60abb8af06b2f77ec4048. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA239800364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5aef7a52c0003ce112781db635146f61206bbde26314ab069bb7f3f079945d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA239800366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fcc89325b98b1720f3263e9cda5fb2518b50c497af62a54d5572f718c846d3. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:30:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA239800377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa14aef72d25742860ed80d0527dd67833d3d85db1604ec52854de6edf5c3ec9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZH810500059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9ebb429fd6f4eaa956faa151809c4e48725cdac39b1d5784043c0fb49ddd25. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZH810500063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59eb0aad654926d06762e9eb1a5769a23f3d75acc2fc8845544bb4e3736df336. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:58:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZH810000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb876c47bc6a3fd1738021dc721bbc3f57f7f9d1d90b35bc53722870ab7da0ab. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:33:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZH811500099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9b0e03148b2ba7cc2285459ad1e43746ad8f1324cba395472921868a81cd7f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:31:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZH811500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107722fe8b031fed9f38513cb4fb88a4f69336753266ff36f63edd0a002411f4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD942300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3d4ab721b248b64e11fb5542c7b6dd8ec23d634c8efecb3f7661d1508e7eb4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD942300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0957c4380c60234b074f2e3e8454a2d47c380fadeaa31d4b564f02b1e8fa2a9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD942300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a516fc5313f466ca467998c3dc3f8a793b4e97d3b656cbed399e81160048447. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD942300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59285f544602abcf02d9b351270dea8511fe451678a6e15c16accd4d40ee4cb8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD942300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f83950f691d24a538d737c41e5de18ffcf4939599883dfd21c4939643e705d8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD942300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd941080e1950dc38e7e4ea2218e010c91a4bf19889df9a9d9b9842e2f98c1ad1. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD942300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5baf1e5adf64cc10f96674abb40659a92cd82ebaccb3a91dbe5f5d96523b1d7c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD942300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcadc79134963496bbe48deadae5332cc9ab32b4e9d15ffd03df3978c952fb68. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD942300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd525a3f2b3d508114fe6b6c2d4b9ef8cbc6b896ab1a1ef658fdef6207bc86a40. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD942300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef5267c6ea1b60fc0a020db6a463322c29aa27e24c5f26e21dc14f3652479a5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD942300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49e604aba4ca168e54be959134e624c020c793b57ea358683a753ed6d558820. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD942300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eeb4cd4cc01717f6893f814435fbdd67c35eafb66ebfba8e25ddb85d9847915. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD942300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6e5ca5b37e3f2de69eba5f740a3b994cf52018ed37ae9497b6b151d492a134. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:34:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD942300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c59a36eae6851c25f7a74379ca157091283150cebea183f8e45085d070f1853. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD942300138.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e19efd9376140da50ca88b6d03ceace7ede9beb1f2adce98805f1cb650056c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD942300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4b26d5a424168f56e546be991e5078abe217dde7ddb3115111e620636e199c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD942300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d92c83564173a7f03b2a808c2d6ea20be8f6a1d3882e0f50705a6ce37d7d46. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD942300142.